In addition to the advantages gained by the interchangeable bbl system of the 455 platform, the 455 Varmint features a heavier, stiffer barrel than its predecessors in the 452 and 453 lines. The 20.5' long .866' diameter cylindrical barrel gives the 455 varmint an accuracy advantage across the wide variety of rimfire loads available today. Any of the accessory barrels available for the 455 platform, including the American and Lux (open sights), as well as other varmint weight barrels in .22LR, .22 WMR or .17HMR, can be easily swapped out due to the larger universal barrel channel of the Varmint model. 5 rd. magazine included. al: .22 LR, .22 WMR, .17 HMR, stock/finish: Walnut/Blue